Well, everybody went off topic immediately, even though Dadan asked not to 
But I'd be interested if you or any other mod could expand a bit and answer the original question. Have you given any thought recently about what kind of board you want Legacy to be?
There are users who don't mind bots and there are users who do mind, so will you consider removing/adding any forum rules (you have changed rules before, it's possible) if there is a wish for it from users? Not taking action is also a statement, and Dadan's fears that Legacy will simply turn into a market for botted items may even come true. I can't really believe you are OK with that (extreme) scenario, because why then would you have created all the other subforums like q&a, farming, builds, etc.? I'm not criticising one side or the other, but just honestly interested in how the legacy team thinks about it 
This is my own opinion but does factor in being a Moderator and on the Legacy Team, but I don't speak for the entire Team:
It's of course been the subject of discussion. I'm sure that's the case since fan forums existed. As has been mentioned botting occured in GW since the early days and I'm sure those items made their way through to trade forums.
I'm sure most are aware that it's possible there are many threads on Legacy now and in the past that have probably contained items sourced through botting, this isn't the first aleged case.
The current forum rules (carried over from GWGuru) don't explicitly prevent this kind of content on the forum, and as a recent post mentioned we don't enforce what happens in-game, that's up to ArenaNet.
These kind of things can be incredibly difficult to prove and while I realise some threads/items are likely a lot more obvious than others it is simpler for moderators and posters to follow existing rules.
I say I'm interested in the discussion because feedback/suggestions from the users and community is always good to have. We're always open for discusion on what could be improved with the rules and with the forum.
So far from this thread it seems to be quite mixed and a good debate.
edit1: For transparency I should probably say that I did trade from the thread when it was first posted, I either hadn't clocked/subcontiously didn't care at the source of the items at the time. That isn't a support of botting by me or Legacy.
Before someone comes in and says that it's allowed for this reason.